Steam superheater of the multiple smoke or fire tube type



July 6 1926.

P. H. HANCOCK STEAM SUPERHEATER OF THE MULTIPLE SMOKE 'OR FIRE TUBE TYPEFiled Nov. 23,1925

3 Sheets-Sheet l 00000.00. .w 00000 00 H @Gru w N M Q w $5 00009@ o0@ndhd nun ad d IIEJLWNNNMH O0@ @G .OGOGOO OQO @Mw Sue e.. he una.. ewuwvd000x 00000000000 @s nauw Tfn www4 anunnun 00 0 M m. 00000000000 IlT|| n |I\ @W n ueu en., Www/@0000 00000000000 Mmwwulhahm This awmww00000000000000 vs e une e. @Q ...wluwd000- 00000000 000 T- Lnnnua 00000000000000 @AJ une e s... ne e -W. NuudOw 34nd. .Iulhs ."NIH l l an. H,s www e=wv=su php -Wand 0 0 0 0. 0000. 0 0 0 0 0 0 n T S INVENTOR.PERC'YVv HAMILTON HANCOCK BY 0/ ATTORNEY.

` July 6 19:26,l l

` Y 1,591,214 P. H. HANCOCK -STEAM SUPERHEATER OF THE MULTIPLE SMOKE 0RFIRE TUBE TYPE l 3 Sheets-Sheet 2 Filed Nov. 25, 1925 l IN VEN TOR.PEQCY HAWLTOH HANCOCK T v I ATTORNEY.

July M1926. 1,591,214

P. H.`HANCOCK STEAM SUPERHEATER oF THE MULTIPLE SMOKE on F1111: Tum:TYPE Filed Nov. 25. 1925 s sheets-sheet 's 'INI/ENTOR. P5120( HAWLTOHHANCOCK BY y,

ATTORNEY.

- BERCY HAMIL Patented 'duly 6, 17926.

' sTEAMsUrERHEArER onT'HnniuLTiPL-E.sMoKn'fonFiREiTuBElTYrE; Y i

Application med November 2a, 1925', seal ma. =7o,s1o,`anairnereaeBritain :rii'neia 192,41."

This invention relatesto steam SillOGIvlleat-'I ers of thesmokeor firetube'tylpe' inv-Which the steam Vsuperheating pipes :or superheater'telementscomprise U-loop portions or pipes vwhich -eXtend into ythesmokel or firev tubes ofI the boiler` and each elementl has its saturated'steam inlet end and superheated 'steam outlet end connected to aheader ornhea'ders in the'smokebox ori-uptakefof the boiler eithervabove 'or toione side of the nest 'of smokeor fire tubesintow ich theU-pipes of theelementsextend. v".Fhepresent invention has been n:primarily designed for Y Vapplication to marine boilers of the Ajsmoke;f-.orrreftube type Asuch as `for instance the WellV known `Scotehnarineboilers, but theinventi'on isnot necessarilyrestricted to ma'- t rineboilers;

. ofthe type abovementioned which possesses or f proYides severalrvimportant p.praeticalin/avd-'Y vantages as 'compa-red;With-.steamfsuperheaters. of theV smoke .for (lire, tubetypees heaters,as tted tov marine boilers,' butfalso 4provides greater facilities vfordisconnecting' the Velements and vvithdratving` them from the boilersmoke tubes when necessaryfto do so7 the construction andfarrangementsbef ingrsuch that every'element appertalningto .anest or -groupmof theboiler Vrsmoke' tubes` vcanV be individuallj-,f vor 'independently-fAandV easily Y disconnectedg'from ythe header g onV headers and Withdrawnfromrthe smoke tube bolts byirvliichthe elementsaife coupled ory nsecured to` the saturatedl and Asupeilfieated,v` steam headers (oritmaybegtoasingle or'tubes to Vwhich it appertains Without rer-1;:lmoving oiivdisturbing anyl other element, ap,-V

pertaining tpo the groupA or nestof smoke n tubes and Without thenecessity "ofspecialev V- and complicated bending ofthe saturatedVsteam. inlet andsuperheated lsteam outlet end portions ofthe elementwhich lie*v or extendy Withintheluptake or smokebox of the-boiler;

lFurther the fastening nuts of the ystuds Vor The V:present invention,.forfits princi.' p alobje'ct to provide 4a steam superheater 1 ToNHANcocKyon 'THQRNT'ON'Y'HEATE ENGLAND, .AssGNoR To '551m,SUPERHEATER'CQMPANEferrNewqrbRKfN-'Y-f f header havingV saturated'andsuperheated yif diseo'nneeting the elements than j in existing' vIsuperheaters ofthe type;l toQWhieh the pres.- Y ent invention l*relates.V i,vVl`urther,gall;v vthefsuvperheater elementsappertainingfto:aigronpf i i or -nest,or it maybe to tvvoor more.g1-longs p' or nests,` of the boilensmokeftuhes uniform orsubstantially'so) one/With other so that all or Vnearly all oftheelements Which-have the same-numberof*U-pipesare interchangeable.urthereaeh` element, ret-Q mov-able from its smokejtub'es individually M3 other element, as abovel VmentionsdLcanl be f readily Vvvithdravvnfromfits smoke tubes by .t

a simple straightl orv'vardjmovement `of ,the 1 and;independently-fofiitheemoval 4ofiV every elementwithin, the une.Qffpfhegroup of smoke Ytubefsifntowhich it extends.

. ,Y 'lhepresentinvention principally consists Y in asteam,-superheatei-oithe type above e speeiliedY in which superheaterelements api' Y pertainingto a Vrovvfor ladjacent Vrovvs of Vsmokelstulgiesjhzave ltheir saturated'steam` inlets' `andfsuperlieatedsteamoutletends connected .n to ia plurality-of* membersfone yfor eachele'-V 'l ment," having steampassages. therethrough which lietransversely g' o'f theflongitudinalf centre lines,ofthesaid smoketubesthesaidgcuy y members beingarrangedk with the"respective 1steampassage's lin lineand beingdetachasblyl rsecuredtoone anotherv andto the headenj4 Thesaid 'header isasusual fitted in ithebsupyf take orv'smokebox of r.thepbo'iler fand in7 thef4 e casevofaJsuperheater"fora,inarinefboilerl the header or headers Wou1d, asusual, be

ranged vertically in'theuptake-.and opposite".` the spacesbetvveen thevseveral; nests olf-the# boilergsmoke'y tubes appertaining to themseveralfurnaeesfof thejboiler..v 2 i yThe above-mentioned membersprovided-,at each'endwith means for icou,-

n Y ktot;T the 'ends' o .f the elements areconnected. are

their steampassagees `i in line,'hsuch meanswiV compr1s1ng,.forinstance'jlanges and'fbolts 0r other fastening devices, andthe membersalfe of such @length `that Wlfllv those bel-Chg;

ing to `the elementsi` appertaining lto, a" 'row .Y v header or headersby the flange or plate on` arrangement being such that any member maylbe. disconnected from the remaining members and from theheaderand,together with the element to which such disconnected y,

drawn to a largerscale'than that of Figs. 1

member appertains, Vbe removed from nthe boiler without disturbing anyother element vor breaking any joints other than those at the oppositeends of the 'said disconnectedthe superheater illustrated in Figs. 1 and2.

member.

Further according to this invention, in a embodiment for application toa marine boiler of the multiplel smoke or fire-tube type, the saturatedsteam inlet end and superheated steam outlet Vend or" each of theelements appertaining to smoke tubes in each horizontal rowor in each oftwo adjacent horizontal rows are connected with (for instance weldedyto) two transversely Yarranged and preferably parallel pipes or tubes onthe vopposite ends of which tubes are provided 25" plates'or flangesvinwhich the ends of the said transversepipes'fare fixed (for instanceexpanded), the'end portions of each element,

extending from the boiler smoke tubes to the said transverse pipes beingplain straight endsk without any bend between the boiler tube plateandthe said" transverse tubes, with the 'possible exception of a slightbendingof the vouter ends the transverse tubes. For fitting lup orcoupling together the ends of the several elements appertaining to thesame horizontal row or rows of smoke tubesthe above` mentioned flangesory plates on the transversely arranged tubes of adjacent elements arebrought together in a vertical-plane and selcured together by meansotstuds inbefore mentioned vertically arranged main header or headersmay be secured to the said the ends of said transverse pipes-adj acentto the header being secured by studs orbolts andnuts either directly -tosuitable faces on l c1 portion V-effva marine boiler showing the boilertube plate for attaching same to' or bolts' and nuts. The plate orflangeA onfthe transat uptake end oit the boiler', and illustrates onehalf of a superheater according'to the presentV invention.

Fig. 2 is a plan view, partly in section, of Fig-1. l

Figs. 3 and 4t are respectively a sectional elevation and a'planotaportion of the boiler and one of Vthe superheaterY elements,

and 2'.- y Y Figs. 5 and 6 are, respectively, a side elevation andplanpof the' main-headers of box or uptake endV of the boiler, and 2 arethe boiler smoke tubes arranged, Vas usual, in groups or nestsappertaining to thefrespective furnaces of the boiler.

3 are the .main headers or" the-superheater arranged vertically y intheyuptake Yoi, the

boiler; these headers Awill be hereinafter more fully described.

As shown in Figs.` 1 and 2 thereisa plu-v j ralityot superheaterelements having U- loops or U-'pipes extending into smoke tubes- 2 ineach of two adjacent lateral or horizontal rows ofthe smoke tubes,. andeach of the superheater elements appertaining to the smoke tubes in thesaid rows has a num; ber of U-'loops extending-into a correspondingnumber of smoke-tubesin the said rows, thesebeing known arrangements.'fV

As hereinbefore mentioned the 'saturated steam inlet and superheatedsteamy outlet ends `or end portions respectively 4, la oit eachofvtlie-superheatery elements are connected lwith a tubular'memberarranged transversely or` at right angles to the said ends or endportions 4, la of the element, the said tubular members in theembodiment illustrated in the drawings consisting of two lengths or pipeor tube 5 and 5f arranged side by side,

the ends of these pipes being secured, forl instance expanded,A in'Yholes in plates or j anges'G and 6a, the end-of the saturate-d i Y 1steam inlet pipe 4 of r`each elem-ent being the side of the header orheaders or to` secured, 'for instance welded, inV registration with ahole or port in the tube '5 andthe superlieated steam outlet end Pof theele-v mentr being similarly secured to the pipe or tube 5a. As will beseen on reference Vto Figs 1 and 2 the end portions land la of beingindicated at 7.' As vshown in Figs. 1

and2, for fitting vup or coupling together the ends of the severalvsuperheater elements belonging to Ythe same horizontal row or rows ofsmoke tubes theflanges orplates A6, Y 62jA of the adjacentitransyersetubular?V i members comprising the tubesand 5a, are

y lf()- and nuts to a correspondingflange-or yplatelbrought*togetherfin:` a vertical plane landse-y l cured together bymeans ofbolts and` nuts',

for instance as illustratedjn'*Figure1440ithe drawings The iiange orplate main or vertical-header 3 is seciired'by bolts 8y providedon theouter endsh'of'two lsliojrtv tubular connections or projections 9,'19@301i vthefside'of the'main lor'-.vertioaljlieader 5 5; the tubularvconnection 9 makingl* coiii'mu'nif1V ycation With tlie vsaturated steamchamberA of the header andthe-:tubular connection 9a makingcommunication Ywith the superheated4 steam chamber of 'the'header AsWillbe seen the construction-and arrangements are. `such that thefastening lnuts'ffor securingA the flanges or plates Gand 6i-appertainingi` to thej transverse tubularmembeisjof adja-i 'cent'superheater elements in the hoi'rirontal-V roW or rows of smoke tubesare Very easily accessible for manipulation both/for tighten ing up andthus 'securing the several elements in` therow or rowsfofsmoke tubes`together and for disconnecting theV said elements' shoulditfbenecessary to vWithdraw one ori V'more of the elementsr` Y n wiii beunderstood( theffeh lof um: pipes or tubes 5 andi ofthehereinbeforemen#j 'tioned transversely arrangedtub'ular memg-Vlr bers of thesuperheater-elements'is of across area suitably largerthan-thecrossfarea of the pipev (ligand l? respectively) connected r5andi 5, the saidy flanges or plaltes an'd': servingy forcouplingiogetlier theqseveral.y superheater lelements yliauiiigg;U-lo'o-psfapper; I taining to afhorizontal` row orproWs offfthe l boilersmoke tubes. 1

4--'In 4thelconstruction Vthus far descr-:ibed"itl will be understoodVthatv each of the 'f U-loop superheater `elements jas a 'unit comprisesthe transversely arranged tubular members -consisting, intheembodimentillustrated, of 'the lengths of pipe'or tube 5v and-5% lia'vingoiiltheir opposite ends a ytlange'or-plate comrnoii'f to vtheadjacent'ends'OJthe two saidlpipes In Figf, 10 areholesthrough'tlie'ilaiige or plate-6" of'tlie transversely arranged tui knownform in. vWhich tlieendlportions'ot the elements` Within tliejboileruptake jfare:

bular member of 'a superheater eleinent5-'a similar arrangement ofatheboltzliolesbeingv provided in the` flanges or plates 11,-Fig-1 stindicates' the bolts with their-nuts 1 2.

Asshown in Figs. l and?,,certainfofthe supeilieater elements, i. e.the'V elements in the'boilerV vsmoke tubes situated farthest'fromv thevertical or niainheadersB5-'are o'a bent laterally'f'towards thelsaifdi'vertical or main header V3. the 'saturated-steainflinlet,and

fiof the transverse' tubular member of the superheater .elementappertaining tothe smokeftubes nearest the? supeiliea'tedf steamoutletje'en'ds vrof f each of tliesef elements beii'ig secured-in :a.pl-ate'lor l ineiitioiiedlplate'sor flangesgand 6?; the. saidilanges'orplateb being secured to tlie 'adjacentfii'aiige or platev 6,'appertaininggto the adjacent: element inl l-tlie ,rowy-by Y bolts; Y

landas yin?ft-liejcz'tse 0i? "the ii'aiigefplates 6 y y The superbe/atenelements appertai'niiig toiv fthe-1 V'boiler smoke tubes Ein" tlieikintermediate y or centrer nest- Oife-'suoli tubes may befofV some-lWhat 1 differentformVv or. constructionv from j f .those4 above sdescribed. AFor#l1nstancethe superlieater elementsbelonging -tothefeen'tre* siinest .oboiler smoke tubes may#bearrangedasshown'^infFigs. l 'and 2 infwliiclithe .n flanges or Aplates:faregprovidedfonthe lat'- Aerally bent-endsfoff `these' elements andthesaid "angesfor plates; are secured by "bolts short. tubular connectionsto the verticali headen. i 1 1 Inf` the pfi'e-te'j-red embodimentzraccording to: this invention; the main headers 3,3' comi o r 'headerfand'. a superheated-l steam chamber or header preferablyarraiigedi'one*behindV the "other, consistl of lengths; of 1 simple standardsteam'tubeofsuitable diameter'oroross x areain the side or- )iiiopposite "sides of which tubes; openings -13`iand 14 of "suitablediamsof prising as'usuala saturatedz'steam chamber Y eter` or crossareal-are Vprovided they openings 1 13 communicating `fWitli thesaturated steamV chamber :of the 'header' and' the*` openings :,142

cured in holes in tlie hereinbeforementioned flanges 8' forinstanceby'beingxexpandedin i( `theSaid*flanges:ffii" "f Y v"Thetweffpieoes. :ofV -tube' fyvliicli-` constitute the mainlieader `3Withfits'saturated and superbe ated lsteaii'i, l chambers are ipreferably secured;togetlierftlie 'onefbeliin'd the other byu meansfY ofsplitcollarsor' clamps 15l `be-l tween fthe flangesflA of which.` may."beise-` v cured :the plates?` or,` brackets 16, 16" whereby f the mainheader is secured ini` position With-"v iii the boiler uptake, ltliebracketor plate 16 being l secured to ythe Vboiler? tube plate T1 yand.thebracket or plate-.lti securedftofa .2 1 v1 o f suit-able part of orcoiiiiected'iwitlithe structure J of the uptake; -1 The plates: 16 and"16l may `be secured between the anges lc'of vi i the clamps 15 by rivetsorbolts and Vnuts Y It desired tlie collars `Lor clamps 15j-may alsobeWeldediifto fthe-y tubes *forming fthe lieaderzif Each-not? the.- [tubesf'fo'rming, the

headeiv in the.f:embodiment-i-:illustratedv is i' cl'os'ed'fat its'loWerl'end'by;` a :capor platel'lf'r'fVA which l-may: -be Welded tol;the tubes,l :and iat yThe hereinbefore mentioned tubular memberscomprising the transversely or horizontally arranged tubes 5 and 5Vassociated with vor forming part of each superheater element`Y or unitare preferably so arranged thatthe said'tubesfand `5rL liein the planebetweenlthe adjacent rows of smoke tubes ,to

' which the elements appertain.

If desiredthe end'portions or pipes 4,4 of the superheater elements, i.e. the portions which extend into ,the uptake or smoke-v box oftheboiler, may be secured in the respective transverse pipes .or tubes 5yand 5SL byrbeing expanded in holes therein in any known or suitablemanner.

If desired supporting means, forV instance vlugs or brackets, whichmight be secured to the boilerV tube plate 1 at the uptake or smoke boxend of the boiler or to the platesy forming the walls or shell vof theuptake, may be provided for supporting the hereinbefore mentionedtransverse tubes to which the ends loi the superheater elements aresecured. t

l In analternative embodiment of the invention, suitable for applicationto a locomotive boiler, instead of the tubes 5, 5a with end flangeconnections 6, 6a and t-o which tubes the 'saturated steam inlet andoutlet upper endisofsaidtubes 5, 5a to a flange ory end portions 4C,lfof the severalsuperheater elements are secured being arrangedtransversely or horizontally as hereinbefore de-V scribed andshown inthe drawings, the said tubes 5, v5a may be arranged vertically, and theuppermosttube's 5, 5a appe-rtaining to the several elements in arow orrows 1t may be Y a vertical row or rows) of the boiler smoke tubes maybe secured by the flange on the flanges on' the main header which inthis l es case. may tbe arranged horizontally in the 1 upper part of the:smoke box above the group of boiler smoke tubes into which the super-nheater elements extend.

Although in the drawings, Fig. l, an arrangement of the 'superheaterelements is shown in which each elementhas a number of JU-loopsextendingfinto a corresponding number of smoke 'tubes in twoa-djacentrows of smoke tubes, the invention f is not restricted to thisarrangement as elements whichhave a number' o-U-loops extending into thesmoke tubes in-'onlyv one row of smoke tubes might be employed. Q Thefaces of the hereinbefore mentioned ianges or plates 6 and 6a onthe'transverse tubular members onor Vconnected with the saturated steaminlet and superheatedsteam outlet ends of the superheater elements maybe machined true so as Vto provide effective steam tight jointingcftheradjacent fianges 6 and 6a appertaining to the adjacent elements; ifdesired, however, a suitable jointmaking material might be providedbetween the adjacent faces of thesaid flanges 6 and 6a. Similar.provision wouldk of` course be made for the jointing of the flanges 6 ofthe elements situated nearest the main header 3 to theflanges 8 on ktheshort Vprojecting tubes 9 and 9a on the-header. f

What I claim is Y 1 l. In apparatus of the classdescribed, thecombinationof a flue sheet; a plurality kof parallel smoke-tubes securedto saidjsheet; a bi-chambered subsidiary header comprising a pluralityof bi-chambered sections each section obstructing -access tov pluralityof smoke-tubes;a1plurality 'of'tubw lar superheater elements the endsVofeach velement being secured: respectively to the two chambers of asection, each .eleme'nt'ex-v tending into smoke-tubes obstructed byitssection and lying entirely outsidek of allV Vsmoke-tubes obstructed byother lsections than the one Vto which it is secured; where-y byeachsection and its attached elementcan be removed without" disturbing'any` other section.

2. In apparatus of the class described, .the

combination of a -fluesheet;ra plurality of parallel s1noketubes securedto said sheet; a subsidiary bi-'chamber-ed header compris.- ying aplurality of sections; each section composed of two paralleltubevlengths whose ends are secured into Vcommon flanges; said sectionsbeing separably secured to each other by means of said flangesgeachsectionk obstructing access toa plurality of smoke tubes; aatubularAs'uperheater element secured to each section, one endvto each tubelength, 'and extending into smoke-tubes ob structed by such section;each element lying entirely outside of all smoke-tubes obstructed byother sections than the one to which it is secured; whereby eachVsection and its attached element can be4 removed without disturbing anyother section.

V3. In apparatus of the class described, the combination of aflue-sheet; a plurality of parallel smoke-tubes securedctosaidviiuesheet; a main bi-chainbered super-heater header parallel to theYfluefsheetV and out ofV line with the smoke-tubes;.a vplurality ofsubsidiary bi-chamberedV headers secu-red to saidy main header, eachcomprising a'pluraly ity of sect-ions, each section composed ofseparably secured to each other endto end, 90

their ends secured intofcomlnon flanges; eachsectionVobstructingfacce'ss to a plurality vof smoke-tubes; a,V tubularsuperheater element secured to each section, one end to each tube Klength, and extendingy into smoke-tubes obstructed hy lsuchsection; eachelement lying 'entirely outside. pf v all rsmoke-tubesobstructedbytetherfnsectns than tliegone #30.10. 'which tis' secured;wherebyv each section andjits attached element-fcanf'be removed Withoutdisturbing any other section or the main'heder. Y

In testimony whereof 'I alx myv Signal5 ture'ff' Y v ,Y v m n BERCYHAMILTON indicCK.'Y

